HOW DOES EONS^TM WORK?

EONS products use standard pulse start metal halide (PSMH) and high pressure sodium (HPS) lamps in either two or three lamp configurations with a single standard ballast in order to double or triple the lamp life of the EONS product.

• The multiple arc-tubes inside the HPS or PSMH lamps used in EONS fixtures are electrically connected in parallel.
• Voltage is applied across all of the arc-tubes when the fixture is powered on.
• An ignitor is required to pulse a high voltage spike across the gas inside the arc-tubes to form an arc.
• Until an arc is formed inside a single arc-tube, the non-energized lamps act as an open circuit.
• Once an arc has formed, the electric circuit is now complete, and the ballast takes over and regulates the current and voltage going to the primary lamp only.
• The remaining lamps are now acting as an open switch in the circuit and have no electrical effect on the system.

The operation principles used in an EONS product is the same as that used in today’s industry proven Stand-by HPS (SBY) lamps which use dual arc tubes in a single lamp envelope. (note: SBY lamps can also be used in an EONS product)

WHICH LAMP WILL AN EONS^TM PRODUCT OPERATE?

No two arc-tubes are identical. When you place multiple arc-tubes in parallel and subject them to the same high voltage pulse from the ignitor, one will always have a lower starting resistance and will ignite first.

• The lamp with the least usage and highest remaining life traditionally has the lowest starting resistance
  and will ignite first.
• In the case of momentary power loss, the coolest lamp with the lowest starting resistance is usually the first and easiest to strike. (note: no cool down time is required when multiple lamps are available)

Once an arc has formed, the ignitor registers that current is flowing in the circuit and it stops sending any more pulses to the lamps.